PNGGauntlet worked amazingly well.
Problem: I have 3 large image files, all just greyscale logos, very simple graphically and around 450x75 in size. GIMP saved them out at around 390K each. I tried optipng and it did absolutely nothing. I even tried to shrink them in GIMP by cutting their size WAY down and the smallest files were still over 350K.
PNGGauntlet reduced them down to 16K each. Insane changes. MUCH appreciated.
not a support question